Document WordPress telemetry data

[asirota]

As decided in the AspireUpdate project repo ticket #152

Let's document the full telemetry of WordPress for discussion and more sunlight. This will allow the community to

1 understand and learn about what is being collected
2 discuss the value of each element and its potential for good or misuse/abuse
3 guide the team as to what could should be done about the telemetry, if anything

@costdev has compiled this AI generated gist as a starting point.

To be sure it must be confirmed and validated. The User-Agent string for example includes the website url inside it in plain text.